淀粉基水化温升抑制剂对水泥-粉煤灰复合胶凝材料水化的影响

doi:10.11896/cldb.20070076

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Abstract This article mainly studies the effect of starch-based hydration temperature rise inhibitor (TRI) on the setting time, compressive strength, hydration heat release of composite cementitious materials, and compared with pure cement. The effect mechanism is analyzed by comparing the adsorption performance of TRI on cement and fly ash, and the changes of hydration products. The results show that the setting time is extended, and the early strength is also reduced with the increasing of TRI dosage. The TRI has negative influence on the later age strength(60d) of composite cementitious system, while does not affect the later age strength of pure cement system. TRI could effectively decrease the hydration peaks in three systems, thus distribute the heat release over time. Compared with fly ash, TRI intends to absorb on the surface of cement, which results that per cement adsorbs more TRI in composite system to reduce the heat peak more effectively. At the same time, the setting time is extended more, the early strength loss is increased. TRI does not affect the final reaction degree of pure cement system, but it may delay the volcanic reaction of fly ash, thus reduce the later strength of composite system.

Key words： temperature rise inhibitor (TRI) fly ash hydration process concentrated heat adsorption performance

Published: Online: 2021-09-07

CLC number:

TU52

Fund:National Key R&D Program of China (2017YFB0310100),Natural Science Foundation of China (51738004,52008192) and Ministry of Transport of the People's Republic of China (2019-MS1-011).

About author: Yuan Qinreceived her B. S. degree from Chongqing University in 2018. She is currently pursuing her M. S. degree at the School of Materials Science and Engineering, Southeast University under the supervision of Prof.Jiaping Liu. Her research has focused on the influence of starch-based hydration temperature rise inhibitors on the hydration of composite cementitious materials.
Jiaping Liu, a professor, an expert who enjoys special allowances from the State Council, a distinguished professor of the “Changjiang Scholar” of the Ministry of Education, and a recipient of the National Outstanding Youth Fund. He is mainly engaged in basic research, technical development and engineering application of high-performance concrete, and focuses on the three key issues—shrinkage and crack control, rheological control and high performance of cement-based mate-rials. He has completed more than 30 scientific research projects including the “973” project, the key projects of National Natural Science Foundation of China and the “11th Five-Year Plan”, “12th Five-Year Plan”.

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Cite this article:

QIN Yuan,WANG Wenbin,LIU Jiaping. Effect of Starch-based Hydration Temperature Rise Inhibitors on Hydration of Cement-Fly Ash Composite Cementitious Materials[J]. Materials Reports, 2021, 35(16): 16065-16069.

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http://www.mater-rep.com/EN/10.11896/cldb.20070076 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16065

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